/* BEGIN_LEGAL
# The MIT License (MIT)
#
# Copyright (c) 2022, National University of Singapore
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
 END_LEGAL */
#ifndef COND_H
#define COND_H

#include "lock.h"

// Our condition variable interface is slightly different from
// pthreads in that the mutex associated with the condition variable
// is built into the condition variable itself.

class ConditionVariable
{
   public:
      ConditionVariable();
      ~ConditionVariable();

      // must acquire lock before entering wait. will own lock upon exit.
      void wait(Lock& _lock, uint64_t timeout_ns = 0);
      void signal();
      void broadcast();

   private:
      int m_futx;
      Lock m_lock;
      #ifdef TIME_LOCKS
      TotalTimer* _timer;
      #endif
};

// hack
#include "cond.cc"

#endif // COND_H
